Filter or screen for service-pipes.



No. 734,812. PATBNTED JULY 28, 1903.

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42E-Zi- `a view in elevation.

" UNITED STATES Patented July 28, 1903.

JAMES F. BUSH, OF WATERVILLE, MAINE.

vFILTER OR SCREEN `FOR SERVICE-PIPES.

SPECIFICATION forming part of Letters Patent No. 734,812, dated July 28, 1903. Application led July 1l, 1902. Serial No. 115,141. (No model.)

To .all whom it may concern.-

Be it known'that I, JAMES F. BUSH, a resident of Waterville, in the county of Ken nebec and State of Maine, have invented certain new and useful Improvements in Filters or Screens for Service-Pipes; and I do hereby declare the following fo be a full, clear, and exact de scription of the-invention, such as will enable others skilled in the art to which it appertains to make and use the same.

lMy invention relates to an im proved filter or screen for service-pipes, the object of the invention being to prevent the passage of sand and dirt to the servicefpoin't, accumulate the foreign matter, and blow it out at will by the i stream of water without disconnecting any portion of the service-pipes.

With this object in View the invention consists in certain novel `featnresof construction and combinations and arrangements of parts, as will be more fully hereinafter described,

`and pointed out in the claims.

In the accompanying drawings, Figure lis Figf2 is a view in vertical longitudinal section. Fig. 3 is a view in horizontal longitudinal section, and Fig. fl is a View of the screen removed.

1 represents thatportion of the service-'pipe `constituting the screen-casing, which is of the shape shown, having a depending portion 2, in which an opening 3 is provided into an internally-screw-threaded nipple 4, and an externally-'serew-threaded nipple on a bulb 6 is screwed into nipple 4, the outlet end of said bulb being providedwith a suitable valve,

7 to permit the blowing off of the sand and dirt collected in the bulb, as will hereinafter appear. The top of casing 1 is made with a large opening surrounded by an internally-` screw-threaded flange 8, into which a plug 9 is screwed to closesaid opening.

The casing 1 is cast with inclined parallel grooves or guides' 10 in opposite sides, extending from the opening in the toptoa point at one side of nipple 5, and in these guides my improved screen ll is located andsupported inan inclined position, as shown. The lower endofthe screen is located over nipple 5 to compel sand and dirt caught thereby to pass down through the nipple into bulb 6 and collect therein. The screen 11 comprises a metal plate having openings therein, Vand to one face of the plate a Wire-netting of any desired mesh is secu red, thus compelling all waterpassing through the casing to pass through the screen, and the upper end of the screenplate is provided with a lip 12 to facilitate the removal thereof through the opening in the top of the casing when occasion may require this to be done.

The operation of my improvement is as follows: The sand and dirtin the water are stopped by screen 11 and gravitate 01.* settle into bulb 6, and when it is desired to clean the latterit is simply necessary to open valve 7, when the Water rushing through the coutracted nipple into and through the bulb will carry with it the accumulation of sand and dirt. The valve can then be closed and the sand permitted to again collect in the bulb.

While my improvements are especially adapted for use in connection' with paperpulp machines, they may be employed for various other purposes, and hence I do not limit myself to any particular use.

A great many changes might be madein the general form and arrangement of the several parts described without departing from my invention, and hence I do not wish to be limited to the precise construction set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my invention.

Havingfully described my invention, what I claimlas new, and desire to secure by Letters p chamber, ,and a diagonally-disposed screen in:

the service-pipe.

2. The combination with a service-pipe having a contracted opening in its wall, of a removable inclined screen across the same, a

bulb below the pipe and communicating withv the contracted opening in said" pipe adjacent to the lower edge of the screen, and a valve at the outlet end of said bulb.

3, The combination with a service-pipe having an opening in its top, and parallel guides in its sides, a screen removably se-` cured in said guides and a plug closing the In testimony whereof I have signed this opening and locking the screen in place, said specification in the presence of two subscribservice-pipe also having a, contracted opening ing Witnesses. in its bottom Wall, of a bulb communicating I by said contracted opening with said pipein Witnesses: advance of the screen and having a valved WILLIAM H. BooKER,

outlet. LINWooD M. I-IARRIMAN.

' JAMES E. BUSH. 

